What is an air defense zone established for the protection of key assets or facilities, other than air bases, where weapon systems may be fired at any target not positively recognized as friendly?

• A. Short Range Air Defense Engagement Zone
• B. Special Use Airspace
• C. Weapons Engagement Zone
• D. Weapons Free Zone

Answer: (D)

The situation is describing a Weapons Free Zone. In this setup, an air defense area is created around key assets or facilities (not necessarily an air base), and weapons systems are allowed to engage any target that is not positively identified as friendly. The goal is rapid defense of high-value sites where waiting for perfect positive identification could allow a threat to cause damage, so unidentified or non-friendly aircraft can be treated as a potential threat and engaged if they pose a risk.

Special Use Airspace governs how the airspace itself is used and protected, not the specific engagement rules for unidentified targets. A Weapons Engagement Zone is a broader term for a defined airspace where engagements can occur under certain identification rules, but the description here—protecting assets other than air bases and allowing engagement of any non-friendly target—fits the Weapons Free Zone precisely.